Today, my boyfriend and I had sex for the first time. He's Latino, so I thought he'd like it if I made a bit of noise and called him "papi" while we did it. It freaked him out enough to kill his boner, and now he thinks I have some kind of incest fetish. FML

It's not the same in Spanish. Many guys call their girls or Sexy girls "mami" and many girls call their guys "papi. A lot of guys like that. It's kind of like a Sexy nickname for us. We're not really calling each other mommy and daddy. Either OP's boyfriend isn't Hispanic enough to do that, or he has problems. Even if he isn't into that, him thinking she has an incest fetish is crazy.

It all depends where the guys are from: Puerto Ricans and "Caribbean" people use the MAMITA / papito expression.
Mexicans and Central Americans use MAMACITA and PAPACITO which is the sexy form that OP was looking for. But it also has a 'cat-calling' connotation.
Now you know...

I find it super weird, once a guy kept asking me to call him "daddy" and it ruined the mood completely. I love my dad and would never call anyone else that, even when he's gone. Especially during sex, no thanks!

I don't find anything wrong with it. I man, different strokes for different folks right?
anyway, ever since I saw Bonnie and Clyde, I just think of the sister in law calling her husband 'daddy' so I call my bf daddy with the same accent for fun x)

I was just about to say the same as #107. I don't call my boyfriend "daddy", nor would I ever, but it is a form of submission & dominance. I previously thought it was weird and creepy as well, but it's just a sexual kink. Everyones got one. Once you learn about different kinds of fetishes, you realize that even some of your fetishes may be weird to others. But to each their own, that's their business.

It's really different for mexicans. And that's what makes it interesting. Cause come on no one wants to have a boring relationship. So sometimes spicing it up is a good thing. But just make sure you know what that person likes before assuming something. XD or else it just ends up all bad.

In the BDSM community, a "Daddy" is a Dominant who is nurturing and protective, rather than one who tends to be more strict. Having said that, I've been that kind of dominant in this community for almost 2 decades, and I HATE being called Daddy. It creeps me out.

There are quite a few Latino guys who prefer their girls call them variations of "papi" whom I have met. It's not based on a fetish either, it just makes them feel like their girl wants them to be a big part of their life. I find it unusual, but not bad or weird.
There are some white guys who like the same thing, but I don't understand their reason.